Fix casting and add casting test (#243)

crates/lune-std-ffi/README.md

@@ -31,6 +31,8 @@ See [tests/ffi](../../tests/ffi/README.md)
 
 - Array argument in cfn
 
+- Ref boundary fix
+
 ## Code structure
 
 ### /c
@@ -84,12 +86,11 @@ Implememt type-casting for all CTypes
 
 - **Trait `FfiSize`**
 - **Trait `FfiSignedness`**
-- **Trait `FfiConvert`:** Provide read LuaValue from FfiData or write LuaValue into FfiData
 
-**Traits:** Provide call information trait
+**Structs:** Provide call information trait
 
-- **Trait `FfiArg`:** Used for argument boundary checking and callback argument ref flag
-- **Trait `FfiResult`:** Used for result boundary checking
+- **Struct `FfiArg`:** Used for argument boundary checking and callback argument ref flag
+- **Struct `FfiResult`:** Used for result boundary checking
 
 **Trait `FfiData`:** Provide common data handle, including methods below
 
@@ -97,6 +98,14 @@ Implememt type-casting for all CTypes
 - **Method `get_inner_pointer`:** returns raw pointer `*mut ()`
 - **Method `is_writable`**
 - **Method `is_readable`**
+- **Method `copy_from`** copy data from another data
+
+- **Trait `FfiConvert`:** Provide methods for read LuaValue from FfiData or write LuaValue into FfiData
+
+- **Method `value_into_data`:** set data with lua value
+- **Method `value_from_data`:** get lua value from data
+- **Method `copy_data`:** copy sized data into another data
+- **Method `stringify_data`:** stringify data with specific type
 
 > Note: `GetFfiData` trait in `data/mod.rs` provides `AnyUserData.get_data_handle() -> FfiData` method
 
@@ -108,6 +117,7 @@ Implememt type-casting for all CTypes
   - **Function `num_cast<From, Into>(from: FfiData, from: FfiData)`:**
     Cast number type value inno another number type
 - [**Mod `libffi_helper.rs`:**](./src/ffi/libffi_helper.rs)
-  - **Const `FFI_STATUS_NAMES`:** Used for ffi_status stringify
-  - **Function `get_ensured_size`:** Returns ensured ffi_type size
+  - **Const `FFI_STATUS_NAMES`:** Used for `ffi_status` stringify
+  - **Function `get_ensured_size`:** Returns ensured `ffi_type` size
   - **Const `SIZE_OF_POINTER`:** Platform specific pointer size (Compile time known)
+  - **Function `ffi_status_assert`:** Convert `ffi_status` to `LuaResult<()>`

crates/lune-std-ffi/src/c/types/mod.rs

@@ -115,7 +115,7 @@ where
         into: &Ref<dyn FfiData>,
     ) -> LuaResult<()> {
         define_cast_num!(
-            From, self, into_info, from_info, from, into,
+            From, self, from_info, into_info, from, into,
             u8 u16 u32 u64 u128 i8 i16 i32 i64 i128 f32 f64 usize isize
         )
     }

tests/ffi/README.md

@@ -16,22 +16,20 @@ gcc for library compiling (for external-\*)
 
 **Luau-side**
 
+- [x] [isInteger](./isInteger)
+- [x] [cast](./cast.luau)
+
 - [ ] [pretty_print](./pretty_print)
 
   > need box, ref test
 
-- [x] [isInteger](./isInteger)
-- [ ] [into_boundary](./into_boundary)
+- [ ] [write_boundary](./write_boundary.luau)
 
-  > need assertion
+  > Failed, need fix
 
-- [ ] [from_boundary](./from_boundary)
+- [ ] [read_boundary](./read_boundary.luau)
 
-  > need assertion
-
-- [ ] [cast](./cast)
-
-  > need assertion
+  > Failed, need fix
 
 ## Benchmark Results
 

tests/ffi/cast.luau

@@ -0,0 +1,13 @@
+local ffi = require("@lune/ffi")
+
+local floatBox = ffi.f32:box(1.2)
+local intBox = ffi.box(ffi.i32.size)
+
+ffi.f32:cast(ffi.i32, floatBox, intBox)
+
+local castedInt = ffi.i32:readData(intBox)
+
+assert(
+	castedInt == 1 and ffi.isInteger(castedInt),
+	"castedInt == 1 and ffi.isInteger(castedInt) assersion failed"
+)

tests/ffi/isInteger.luau

@@ -1,10 +1,7 @@
---!nocheck
---!nolint
-
 local ffi = require("@lune/ffi")
 
 local int = 0b1
 local float = 0.5
 
-assert(ffi.isInteger(int) == true, "ffi.isInteger(int) == true failed")
-assert(ffi.isInteger(float) == false, "ffi.isInteger(float) == false failed")
+assert(ffi.isInteger(int) == true, "ffi.isInteger(int) == true assersion failed")
+assert(ffi.isInteger(float) == false, "ffi.isInteger(float) == false assersion failed")